priceless, valuable, valueable, estimable, valued, valeyable, revaluable, imprescindible, undispensable, important, more...

worthless, useless, trivial, insignificant, expendable

priceless, inestimable, unquantifiable, unmeasurable, unfathomable, more...

such, poor, most, dramatic, own, aristocratic, aramatic, aromatic, good, usual, pharynx

extremely helpful,   extremely useful,   incredibly helpful,   super helpful,   incredibly useful,   super useful,   immensely helpful,   enormously useful,   amazingly helpful,   beyond worth